Be careful and remember the model number of your vacuum cleaner
I bought this to replace an old Craftsman filter (with another and replaced model number). The size and type was the same as my old filter - wrong! I then ordered a pair of 17810 filters to fit my vacuum and were also of the Allergen (etc) type.
Pros
WASHABLE FILTER MATERIAL: Filter material can be washed and reused to better filter dirt